866244 has 24 divisors (see below), whose sum is σ = 2076928. Its totient is φ = 280800.

The previous prime is 866231. The next prime is 866279. The reversal of 866244 is 442668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532 + ... + 1419.

2⁸⁶⁶²⁴⁴ is an apocalyptic number.

It is an amenable number.

866244 is an abundant number, since it is smaller than the sum of its proper divisors (1210684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866244 is a wasteful number, since it uses less digits than its factorization.

866244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1993 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 866244 is about 930.7223001519. The cubic root of 866244 is about 95.3264485006.

The spelling of 866244 in words is "eight hundred sixty-six thousand, two hundred forty-four".